A. improvement of casting characteristics
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above
A. iron
B. copper
C. aluminium
D. zinc
E. nickel
A. improvement of casting characteristics
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the above
A. copper and tin
B. copper and zinc
C. copper and iron
D. copper and nickel
E. copper and chromium
A. 1% silver
B. 2.5% silver
C. 5% silver
D. 10% silver
E. 100% silver
A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
B. 92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg
C. 90% aluminium and 90% copper
D. 90% magnesium and 9% aluminium with some copper
E. 90% magnesium and 10% tin
A. stainless steel
B. gun metal
C. german silver
D. duralumin
E. cast iron
A. lead base alloy
B. tin base alloy
C. copper base alloy
D. all of the above
E. A. and C. above
A. greater than 7
B. less than 7
C. equal to 7
D. pH value has nothing to do with neutral solution
E. none of the above
A. gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
B. Mg, Zn, Ti, Zr, Br, Cd
C. a iron (below 910°C and between 1400 to 1539°C), W
D. all of the above
E. none of the above